Apparatus for controlling the flow of molten glass through a discharge aperture



May 31, 1927. 1,631,061

C. H. RANKIN APPARATUS FOR CONTROLLING THE FLOW 0F MOLTEN GLASS THROUGH A 01mm: RTURE Filed 2e, 1 I

llTTO/PNE Y 1 being preferably of lsr r diameter than the The invention can he applied to apparatus comprising a rotating propelling screw 72.

I it.

instead of e reciprocatory rotary or nonrotary plunger, wherein the molten. glass is propelled through the discharge orifice by the action of the screw The sleeve can be rotary or it can he held against rotation and can he adjustable or have a reciprocotory movement towards and away from the floor of the discharge cup. The interior wall of the sleeve may he of cylindrical or conical form end, as shown in Figure 3, can be provided with spiral grooves, ribs or heads 2'. In the case of a rotary sleeve the spirals may he in the some or in the opposite direction to the rotary movement otthe sleeve. If desired spiral beads or rihs j can he also provided on the interior wellof the'olischarge aperture. In thiscose, so long as the sleeve is stationary, the ribs hy increasing the surface incontact with thegln ss operate to prevent the glass from rotating with the screw and thereby increase its propelling effect. By rotating the sleeve either in the some or in the opposite direction to the screw "the propelling elfect of the latter can he variously and variably:

' modified. By providing ribs or heads having a spiral formation and reciprocating the .sleeve axially s. rotory motion con he imported to the glass in the gloss containing vessel.

The sleeve can however he provided either interiorly or exteriorly or hoth interlorly and exteriorly with circularrihs 'or-lcecds is as shown in Figure l. "When ribs or heads eitherin the form of screw threads or circul ar hands ere provided on the exterionoi' interior of the sleeve the latter in moving axially operates to'lilt or to force downthe glass close to the -sleeve'thereby setting up- .n circulatory movement or the glass 1n a.

discharge cup oriother vessel in which the glass is contained end thereby the. glass is maintained at a 'inore'uniform temperature m in all ports of the said vessel.

Instead of providing a cylindrical or coilical sleeve the said sleeve can he made of an irregular, oval, polygonal or other convenient shnpe,cither in cross-section or n longijtudmal' section, to serve substantially the same purpose. Thus a sleeve a can be provided having a. wavy, non-circular form as shown in Figure 5 orit may he of a regular oval form us shown by the sleeve a? in Fig- ;ure 6 with longitudinal ribs, or heads I).

' In apparatus of the kind to which. the inventionrelates it has heretofore been usual to arrange the sleeve concentrically with the plunger which is movable coaxially with the discharge orifice but this is not essential and if required a plunger 72? which may he rotatable as well as axially movable may be arranged eccentricully in; a sleeve'of oval, cy-

lindriccl or conical cross section.

I. claim:v 1. In apparatus for controlling the flow of molten. glass through a discharge aperture, the combination of a plunger arranged in axial alignment with the said aperture, a. sleeve surrounding and spaced apart from the said plunger, and corrugations on the interior wallet the said sleeve. 1

2. In apparatus for controlling the flow oi molten gloss through c. discharge eperture, 'a. plunger arranged innxiel alignment with the said aperture, a sleeve surrounding and spaced apart from the said plunger end cormolten glass through a discharge aperture,

a liner having the said discharge aperture formed therein, corrugations on the, interior wall of the said aperture, a. plunger arranged in axiolelignlnent with the said apertune, a sleeve arranged coexiully with the plunger to enclose an annular spaceeround the said plunger and corrugations on the interior'wall of the said sleeve.

4:. In apparatus for controlling the how of molten. glass'through c. discharge'cperture, the combination of'meens for-propelling the molten glass through the said aperture, a;

- sleeve arranged coexially with the discharge 1 aperture and enclosing u space within which the said propelling ineunsoperate, and cor rugations on the well of said sleeve.

5. In apparatus for controlling the flow of molten glass through c. discharge aperture, a liner having the discharge aperture formed therein, corrugations on the well of the said operture,-nieens for propelling the molten glass through the said aperture, and s. rotary sleeve surrounding the said propelling means, and spiral corrugations formed on the in: 'terior wall thereof. 7

6. In apparatus for controlling the flow of moltenglass through c discharge aperture, the combination of a liner having the dis cherge .aperture formed therein, a plunger arranged in axial alignment with the said aperture and n sleeve having a wavy nonported around the said plunger.

inoltenglass through a discharge aperture, the combination of a. rotary and axially movable plunger having corrugations thereon, u rotary axially movable sleeve surrounding the said plunger, and corrugations on the wall of the said sleeve.

8. In apparatus for controlling the flow of molten glass through a discharge aperture, the combinutionof a liner having the said aperture formed therein, corrugations on 7-. In apparatus for controlling the flow of earner Q hhe wall of %he said aperture, a rotary and the combination of a member having the said axially movable plunger arranged in alignaperture formed therein, a rotary and axially ment with the said aperture, and a rotary movable plunger, a rotary and axially mova- 310 and axially movable sleeve surrounding and ble sleeve around said plunger and spaced 5 spaced apart from said plunger. apart therefrom, and corrugations on the 9. In apparatus for controlling the flow of Wall of the said sleeve. molten glass through a discharge aperture, CARL HENRY RANKIN. 

